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Theorem funcnv0 6624
Description: The converse of the empty set is a function. (Contributed by AV, 7-Jan-2021.)
Assertion
Ref Expression
funcnv0 Fun

Proof of Theorem funcnv0
StepHypRef Expression
1 fun0 6623 . 2 Fun ∅
2 cnv0 6150 . . 3 ∅ = ∅
32funeqi 6579 . 2 (Fun ∅ ↔ Fun ∅)
41, 3mpbir 230 1 Fun
Colors of variables: wff setvar class
Syntax hints:  c0 4326  ccnv 5681  Fun wfun 6547
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1789  ax-4 1803  ax-5 1905  ax-6 1963  ax-7 2003  ax-8 2100  ax-9 2108  ax-12 2166  ax-ext 2699  ax-sep 5303  ax-nul 5310  ax-pr 5433
This theorem depends on definitions:  df-bi 206  df-an 395  df-or 846  df-3an 1086  df-tru 1536  df-fal 1546  df-ex 1774  df-sb 2060  df-mo 2529  df-clab 2706  df-cleq 2720  df-clel 2806  df-ral 3059  df-rex 3068  df-rab 3431  df-v 3475  df-dif 3952  df-un 3954  df-in 3956  df-ss 3966  df-nul 4327  df-if 4533  df-sn 4633  df-pr 4635  df-op 4639  df-br 5153  df-opab 5215  df-id 5580  df-xp 5688  df-rel 5689  df-cnv 5690  df-co 5691  df-fun 6555
This theorem is referenced by:  f10  6877  pthdlem1  29600  0trl  29952  0pth  29955
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